the windows look "factory" because they're done the proper way, as any auto glass shop could do .... back when lots of trades people used panels [before "vans"], many wanted a bit more daylight in the cargo area, or wanted better vision in tight places, pretty common modification .... and I wouldn't call them "oval", they're like all the windows, rectangles with rounded corners .... much easier to put rubber seals around than squared corners
good luck bringing the old rig back to life, keep us up on your progress
Bill
